<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>state</title>
</head>
<body>
  <!-- 准备好一个“容器” -->
  <div id="test"></div>

  <!-- 引入react核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>

  <!-- 此处一定要写babel -->
  <script type="text/babel">
    // let that
    // 1. 创建组件
    class Weather extends React.Component {
      // 初始组件
      state = {isHot: true, wind: '微风'}

      render() {
        const {isHot, wind} = this.state
        return <h1 id="title" onClick={this.changeWeather}>今天天气很{isHot ? '炎热':'凉爽'},{wind}</h1>
      }
      // 自定义方法——要用赋值语句的形式+箭头函数
      changeWeather = () => {
        const isHot = this.state.isHot
        this.setState({
          isHot: !isHot
        })
      }
    }
    ReactDOM.render(<Weather/>, document.getElementById('test'))

  </script>
</body>
</html>